package com.atguigu.gulimall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.common.exception.BizCodeEnume;
import com.atguigu.common.utils.R;
import com.atguigu.gulimall.auth.feign.MemberFeignService;
import com.atguigu.gulimall.auth.feign.ThirdParFeignService;
import com.atguigu.gulimall.auth.vo.UserLoginVo;
import com.atguigu.gulimall.auth.vo.UserRegistVo;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@Controller
public class LoginController {

    /**
     * 发送一个请求直接跳转到一个页面
     * SpringMVC viewcontroller : 将请求和页面映射过来。
     * @return
     */
    @Autowired
    ThirdParFeignService thirdParFeignService;

    @Autowired
    StringRedisTemplate redisTemplate;

    @Autowired
    MemberFeignService memberFeignService;


    @GetMapping("/sms/sendcode")
    @ResponseBody
    public R sendCode(@RequestParam("phone")String phone){
        //TODO 1、接口防刷
        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if(!StringUtils.isEmpty(redisCode)){
            long l = Long.parseLong(redisCode.split("_")[1]);
            if (System.currentTimeMillis()-l<60000) {
                //60秒内不能再发
                return R.error(BizCodeEnume.SMS_CODE_EXCEPTION.getCode(),BizCodeEnume.SMS_CODE_EXCEPTION.getMsg());
            }
        }

        //2、验证码的再次校验。redis .存key-phone , value-code  sms:code:18153848896 -> code

        String code = UUID.randomUUID().toString().substring(0,6);
        String substring = code+"_"+System.currentTimeMillis();
        //缓存验证码 过期10分钟
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX+phone,substring,10, TimeUnit.MINUTES);
        R r = thirdParFeignService.sendCode(phone, code);
        return R.ok();
    }

    /**
     * RedirectAttributes 模拟重定向携带数据
     * // TODO 重定向携带数据，利用session原理。将数据放在session中。
     *  只要跳到下一个页面取出这个数据以后，session里面的数据就会删除
     *
     *  //TODO 1、分布式下的session问题
     *
     * @param vo
     * @param result
     * @param redirectAttributes
     * @return
     */
    @PostMapping("/regist")
//    @GetMapping("/regist")
    public String regist(@Valid UserRegistVo vo, BindingResult result, RedirectAttributes redirectAttributes){
        if(result.hasErrors()){
            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));

//            model.addAttribute("errors",errors);
            redirectAttributes.addFlashAttribute("errors",errors);
            //Request method 'POST' not supported
            //用户注册-> /regist[post] ->forward转发 (路径映射默认都是get方式访问的)
            //

            //如果校验出错
            return "redirect:http://auth.gulimall.com/reg.html";
        }

        //1、校验验证码
        String code=vo.getCode();

        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if(!StringUtils.isEmpty(s)){

            if(code.equals(s.split("_")[0])){
                //删除验证码;令牌机制 用完就丢
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                //验证码通过。 //真正注册。调用远程服务进行注册
                R r = memberFeignService.regist(vo);
                if(r.getCode()==0){
                    //成功
                    Map<String, String> errors=new HashMap<>();
                    errors.put("msg",r.getData("msg",new TypeReference<String>(){}));
                    redirectAttributes.addFlashAttribute("errors",errors);
                    return "redirect:http://auth.gulimall.com/login.html";
                }else{
                    return "redirect:http://auth.gulimall.com/reg.html";
                }

            }else{
                Map<String,String> errors=new HashMap<>();
                errors.put("code","验证码错误");
                redirectAttributes.addFlashAttribute("errors",errors);
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        }else{
            Map<String,String> errors=new HashMap<>();
            errors.put("code","验证码错误");
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.gulimall.com/reg.html";
        }
    }


    @PostMapping("/login")
    public String login(UserLoginVo vo,RedirectAttributes redirectAttributes){
        //远程调用登录
        R r = memberFeignService.login(vo);
        if(r.getCode()==0){
            //TODO 1、登录成功处理
            return "redirect:http://gulimall.com/";
        }else{
            Map<String,String> errors=new HashMap<>();
            errors.put("msg",r.getData("msg",new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.gulimall.com/login.html";
        }
    }
}
